Ventilator.



PATBNTED JUNE 11, 1907. J. P. Bowles.

VENTILATOR.. AAAAAAAAAAAA ILBD FEB. 20. 1907.

A TTOHNE Y S UNITED. STATES PATENT oEEioE.

VENTILATOR.

Specification of Letters Patent.

Patented June 11, 1907.

Application filed February 20,1907. Serial No. 358,353.

which the following is a full, cleai, and exact.

description.

This invention has m View the provision of a ventilator such as are ordinarily removably placed in window openings of buildings, cars,

etc. and which will automaticallyT operate to close and shut off a ldraft of air on blowing therethrough. I accomplish this by swingingly suspending two or more sheets of thin material within the opening of the ventilator frame, said sheets being slightly spaced apart and having slots or other openings arranged out of alineinent, whereby as the sheets are blown together, the ventilator is automatically closed, and when separated, the ventilator is likewise opened.

Reference is to be had to the accompanying drawings forming a part of this specification, in which similar characters of reference indicate corresponding parts in all the figures.

Figure 1 is an inside perspective view of a window showing my improved ventilator applied thereto; Fig.2 is across section through the window frame and ventilator, as shown in Fig. 1; Fig. 3 is a side elevation of the ventilator, partly broken away to inoi'e clearly Show the interior construction thereof, and Fig. 4 is a section on the line 4-4 of Fig. 3.

The preferred embodiment of my iiivention comprises a rectangular or similarly shaped frame 1, having hinged at the opposite ends thereof, blocks 2 adapting said frame to be readily inserted between the jambs of a window opening. The opening of the frame 1 is covered on both the front and back with a thin fabric, wire screen or other like material 3, which is held in place bya molding 4, the latter providing an ornamental border. As shown in Figs. 2 and 4,

the coverings 3 form an air chamber on thel inside of the frame 1 equal to the thickness thereof. Within this air chamber is swingingly suspended at its top edge a sheet or wall of thin material 5, as for example, paper, said sheet being of an extent to lill the opening within the frame 1, and is constructed with a series of slots or otheropenings 6, as clearly shown in Fig. 1, the slots preferably running in avertie al direction and dividing the sheet into vertical bars 7 connected together Slightly spaced by a lower horizontal bar S.

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from the sheet 5 is a sheet or wall of like thin material swiiigingly suspended from the top of the air chamber, as clearly shown in Fig. 4. The sheet 5u is also of an extent to substantially cover the frame opening, and is likewise constructed with a Series of vertical slots or other openings 6a dividing the sheet into a number of vertical bars 7 *l connected together at their lower ends by a horizontal bar 8a. The bars 7"l of the sheet 5u are arranged opposite the slots or openings 6 of the sheet 5 that is, they are arranged between the intervals of the bars 7 of the sheet 5, and are somewhat wider and shorter than the slots or openings 6, as clearly shown in Fig. 3, whereby when said sheets swing together they will presenta solid wall within the ventilator opening and thus prevent the air from passing therethrough, It is a parent from this construction that when t e wind blows through the outside covering and comes in contact with the bars of the outside Sheet, the same will be caused to move inwardly in contact with the inner sheet, thus automatically shutting off all wind or draft through the ventilator, which will last as long as the wind continues to hold the sheets in contact. The wind on easing up, the sheets will automatically separate and thus open the ventilator. The latter will continue to close and open at all times without any attention whatsoever. It is apparent from this construction that a room or other iiiclosuie in which my improved ventilator is used, may be supplied with the requisite quantity of fresh air without subjecting those within, to any undue draft.

Although I have shown and described my invention as it is preferably arranged and constructed, I nevertheless regard the precise embodiment as not essential provided the essential characteristics are employed as pointed out in the annexed claims.

Having thus described my invention I claim as new and desire to secure by Letters Patent:

1. A ventilator comprising a frame, a sheet of material swingingly suspended within the frame having openings, and a second sheet of material suspended within the frame and having openings out of alinemeiit with the openings in the first sheet, whereby as said sheets are blown together, the ventilator will be closed, and when they separate, the ventilator will be opened.

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` 2. A ventilator comprising aframe, a sheet of thin material having openings swingingly suspended within the frame, and a second sheet of thin material and swingingly suspended within the frame having openings out of alinement with the openings of the first sheet, whereby as said sheets are blown together, the ventilator will be closed, and when they separate, the ventilator will be opened.

3. A ventilator comprising a frame having an opening, a covering at both sides of said o ening providing an air chamber, a sheet of t `n material having openings and swingingly suspended within the frame having openings out of alinement with the openings of the irst sheet, whereby as said sheets are blown together, the ventilator will be closed, and when they separate, the ventilator will be opened.

4. A ventilator comprising a frame having an opening, blocks hinged at the opposite ends of the frame, a covering at both sides of the frame opening providing an air chamber therebetween, a sheet of thin material having o enings and swngingly suspended within t e frame, and a second sheet of thin material swingingly suspended within the frame and having openings out of alinement with theo enings in the rst sheet, whereby as said s eets are blown together the ventilator will be Closed, and when they separate the ventilator will be opened.

5. A ventilator comprising a frame, a sheet of thin material having openings and swingingly suspended at its top edge within the frame, and a second sheet of thin material swingingly suspended at its top edge within 4the frame and having openings out of 4alinement with the openings in the rst sheet, whereby as said sheets are blown together, the ventilator will be closed, and when they separate, the ventilator will be opened.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

JOHN FRANKLIN BOWES. Witnesses: EDsoN M. HODGE, BENJ. T. MAGENIs. 

